210001220112 has 80 divisors (see below), whose sum is σ = 546205040640. Its totient is φ = 69523445376.

The previous prime is 210001220111. The next prime is 210001220129. The reversal of 210001220112 is 211022100012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (210001220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10242223 + ... + 10262705.

It is an arithmetic number, because the mean of its divisors is an integer number (6827563008).

Almost surely, 2^210001220112 is an apocalyptic number.

It is an amenable number.

210001220112 is an abundant number, since it is smaller than the sum of its proper divisors (336203820528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210001220112 is a wasteful number, since it uses less digits than its factorization.

210001220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21940 (or 21934 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210001220112 its reverse (211022100012), we get a palindrome (421023320124).

The spelling of 210001220112 in words is "two hundred ten billion, one million, two hundred twenty thousand, one hundred twelve".